Guide me with M.S water fasting please 21 or 40 days

I read Water Fasting can cure MS or at least it can help ease some of symptoms, so about 2 weeks ago i decided to start fasting for 21 days and now i'm in day 12 of my water fast, first 3-4 days was hell and i was so hungry up to day 7 and now hunger is gone i feel like i can continue this more than 21 days that i aimed for.

I read so many about the benefits of Water Fasting for MS, but some said 21 days, some other said 40 days, and another said that it should be decided by expert to do the fasting between 21 to 42 days and i really don't have that kind of experts around me, so far whoever i talked to about the fasting just warned me to don't do it.

Now wandering anyone here can help me to decide or give me any suggestion, guidance.
all helps appreciated.